Probing bumblebee gravity with black hole X-ray data

Abstract

Bumblebee gravity is one of the simplest gravity theories with spontaneous Lorentz symmetry breaking. Since we know a rotating black hole solution in bumblebee gravity, we can potentially test this model with the available astrophysical observations of black holes. In this work, we construct a reflection model in bumblebee gravity and we use our model to analyze the reflection features of a NuSTAR spectrum of the Galactic black hole EXO 1846-031 in order to constrain the Lorentz-violating parameter $\ell$. We find that the analysis of the reflection features in the spectrum of EXO 1846-031 cannot constrain the parameter $\ell$ because of a very strong degeneracy between the estimates of $\ell$ and of the black hole spin parameter $a_{\ast }$. Such a degeneracy may be broken by combining other observations.

9 pages, 5 figures. v2: refereed version

References in corpus (17)

• The Confrontation between General Relativity and Experiment
• Towards precision measurements of accreting black holes using X-ray reflection spectroscopy
• Public Release of RELXILL_NK: A Relativistic Reflection Model for Testing Einstein's Gravity
• Testing the Kerr black hole hypothesis using X-ray reflection spectroscopy and a thin disk model with finite thickness
• Testing General Relativity with NuSTAR data of Galactic Black Holes
• Constraint on parameters of a rotating black hole in Einstein-bumblebee theory by quasi-periodic oscillations
• Attempt to find a correlation between the spin of stellar-mass black hole candidates and the power of steady jets: relaxing the Kerr black hole hypothesis
• A New Spin on an Old Black Hole: NuSTAR Spectroscopy of EXO 1846-031
• Testing the Kerr Black Hole Hypothesis with GX 339-4 by a combined analysis of its thermal spectrum and reflection features
• Testing the Kerr black hole hypothesis with GRS 1716-249 by combining the continuum-fitting and the iron-line methods
• Implementation of a radial disk ionization profile in the RELXILL_NK model
• Constraints on Einstein-Maxwell dilaton-axion gravity from X-ray reflection spectroscopy
• Testing the Kerr black hole hypothesis with the continuum-fitting and the iron line methods: the case of GRS 1915+105
• X-ray reflection spectroscopy with Kaluza-Klein black holes
• Shining X-rays on asymptotically safe quantum gravity
• Testing General Relativity with black hole X-ray data: a progress report
• Singularity-free black holes in conformal gravity: new observational constraints

Cited by in corpus (10)

• Horizon-scale tests of gravity theories and fundamental physics from the Event Horizon Telescope image of Sagittarius A${}^{\ast }$
• Energy Extraction via Magnetic Reconnection in Lorentz breaking Kerr-Sen and Kiselev Black Holes
• Kasner cosmology in bumblebee gravity
• Super-entropy bumblebee AdS black holes
• Impact of reflection Comptonization on X-ray reflection spectroscopy: the case of EXO 1846-031
• Curled orbit and epicyclic oscillation of charged particles around the weakly magnetized black hole in the presence of Lorentz violation
• Anisotropic cosmology in Bumblebee gravity theory
• Conserved charges and asymptotic symmetries of BTZ-like black holes in Einstein-bumblebee gravity
• Testing non-circular black hole spacetime with X-ray reflection
• Optical and Thermodynamic Signatures of Lorentz Symmetry Breaking in Bumblebee AdS Black Holes